Chemistry Midterm Test Questions Study Guide Rated A+

273K {Ans: The freezing point of water is ___.}physical change {Ans: Vaporization of dry ice}anion {Ans: An ___ is an ion with a negative charge.}combustion {Ans: The type of equation that reacts a substance with elemental oxygen is ___.}Polyatomic Ions {Ans: ______ are groups of atoms that are covalently bonded to each other that may be anions or cations.}spectator ions {Ans: These ions remain unchanged on either side of the chemical equation: ___.}physical change {Ans: Hydrogen sulfide has a pungent odor.}insoluble {Ans: When very little of a substance dissolves in a liquid, the substance is said to be ___.}ultraviolet light {Ans: What wavelength is not visible, but highly energetic:}chemical property {Ans: Sulfur burns in air.}Carbon Dioxide is a molecule, not a mixture. This is because itis composed of 3 atoms that are nonmetals. In a mixture, the particles of each atom never combine or bond, but are simply next to one another, whereas in this type of compound, they are bonded. {Ans: Consider the following statement: Carbon Dioxide is a mixture of carbon and oxygen. Tell whether this statement is true or false, and explain.}polar {Ans: Water is